Apparatus for straining or filtering liquids



Oct. '2, 1934. F. c. FULCHER APPARATUS FOR STRAINING OR FILTERING LIQUIDS Filed April 1. 1952 ,Mv-W

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10 dirt and otherjforeign matter.- The fine slots series or contacting members: or discs-are ar-fl65 Patented Oct.'2, 1934 by l APPARATUS FOR s'rnAimN Rv m'rnarnc LIQUIDS Frank Christian Fulcher, Parley, Surrey; England Application; April 1, 1932, Serial No. 602,565

' In Great Britain May 22, 19.21

2 Claims. (01. 210---152) The present invention relates to improvements and the blades may be rotated. Asshown the in or relating to filtering or fine straining appablades pass into slots between the discs, the latratus for fluids of the kind in which the fluid is ter beingmounted on a rotatable spindle zfthe passed by a straight-through flow through fine blades being-prevented from rotating in any'suit 5 slots,v formed between a series of filtering mom-R able way e. g. by being secured to the filter cas bers, scraper blades being provided w'hichpermaing. In anotheriorrhjhe-Qsing and thesoraper nently engage the slots. The scraper blades and blades may bed-mated and the discs 'heldistathe straining walls are-relatively movabledor tionaryQ-l J, j' a;

the purpose of freeing the slots from accumulated .In the example shown it will be noted that a may be formed in various-ways, one example .beranged in the form of a pile, having the two exing a plurality of thin discs spaced apart 'on. a treme outside members of the same length or dicarrier either by washers or bypressed-upporameter, the next opposite pair being of lesser tions of the discsrso as to form peripheral strainlength or diameter, and so on,-to the middle of ing slots at their edges. p'Iypes of fine straining the pile.

apparatus to which thepresent inventionrelates The liquid, filtered may either enter are to befound in the specification-011m "prior through the peripherymf the pile and escape I Patent No. 1,414,120. 1 through a central openingor it nay take a re- According to the present invention, apparatus verse course. In either case it hasaa straight of the class above described is constructed with through flow between two-adjacent filtering memthe filtering members set in. staggered relation- .b'ers. I Y ship so that a graduated trappin'gjor intercepting Additional scrapers forYthe edge'softhadiscs of any foreign matter contained in the liquidis may be provided. Examples thereof are illusobtained, though the actual filtering slot is be-.- trated in Figs.5'to 8 inclusive. When these addi- I 25 tween two parallel members. tional scrapers 8 are used these operate so as to Additional edge scrapers for the members may scrape the external edges of the discs. I be provided, to ensure the more complete clean- The additional scrapers 8 may be fixed to or ing of the same. i adjacent the scrapers 5, as shown in Fig. 6. a Fig. Examples of denying the present invention 7 shows a modification of- Fig. 6 in which the 30 into practice are illustrated in diagrammatic scrapers! and 8 are in the form of a solid block.

form in the accompanying drawing. Fig. 5'shows an additional edge scraper 8 which is In the drawing: located away from the slot scrapers 5. Fig. 8 Fig. 1 is a part sectional elevation, and shows the additionalscrapers 8 applied to the Fig. 2 a. plan of one form of filtering or fine filter construction of Fig. 3.

35 straining apparatus. By the present invention multiple degrees of 0 Figs. 3 and 4 are similar views of another form, trapping or intercepting are obtained. while The movement of the members or discs and/or Figs. 5 to 8 are detail views referred-to later. the cleaning blades-maybe effected by hand or Referring to Figs. 1 and 2 the discs 1 in stagby mechanical means in ahy suitable manner.

ed 0r step-wise formation are mounted on a The scraper blades may be of any suitable form.

rotatable shaft 2 and spaced apart by washers 3 Filters or finestrainers according, to the presmounted 011 r065 The Cleaning es 5 a e ent invention may conveniently take the form of of difierent lengths so as to co-operate with the rectangular or cylindrical ranks or piles, in single appropriate pairs of discs.' The blades 5 are or multiple and in parallelcr in series as desired,

45 mounted on a spindle 6, or the -blades may be It is to be understood that, the slots'in the aprouped on separate spindles located around the paratus to which this invention relates are fine 1 discs. I slots, slots of A slotted cylindrical strainer is shown by Figs. 3 and 4 comprising a series of circular discs 1 I 50 made up as a pile in staggered or stepped relationship and blades 7 passing into the slots beor less width for example serving well for the fine tween the discs, the blades being so proportioned straining of such liquids as petrol,- paraflln, fuel and related to the discs as-tov form cleaning or oil, lubricating oil, oil paint, varnish, etc.

scraping blades; The blades may be fixed and I claim:- Q 55 the pile movable orviceversa, o'r'boththe. discs -1. Filteringor fine straining apparatus f r fluids, comprising a series of spaced apart parallel members, a mounting for said members, the fluid having a straight through flow through fine slots formed between said members, narrow scrapers projecting permanently into said slots for cleaning purposes, additional scrapers for the edges of said members, a common mounting for said narrow and additional scrapers, the members and the scrapers having a relative movement for cleaning, and the members being set in staggered relationship so that a graduated trapping or intercepting of any foreign matter contained in the fluid is obtained as this passes through the filter.

2. Filtering or fine straining apparatus for fluids, comprising a series of spaced apart par- -a11el members, a mounting for said members, the

block, a mounting for said scrapers, the members and the scrapers having a relative movement for cleaning, and the members being set in staggered relationship so that a graduated trapping or intercepting of any foreign matter contained in the fluid is obtained as this passes through the filter.

FRANK CHRISTIAN FULCHER. 

